diff --git a/CharacterWorldBook/src/cwb_state.js b/CharacterWorldBook/src/cwb_state.js
index 75c2ba9..b5d001a 100644
--- a/CharacterWorldBook/src/cwb_state.js
+++ b/CharacterWorldBook/src/cwb_state.js
@@ -9,6 +9,7 @@ export const POLLING_INTERVAL_STEP = 10000;
 
 export const state = {
     masterEnabled: false, 
+    STORAGE_KEY_VIEWER_BUTTON_POS: 'cwb_viewer_button_position',
 
     customApiConfig: { url: '', apiKey: '', model: '' },